[PATCH 0/3] ASoC: stm32: sai: fixes related to synchro feature

[PATCH 0/3] ASoC: stm32: sai: fixes related to synchro feature

[Olivier Moysan]

Fix sai binding and simplify code related to synchro feature.
This change allows to remove stm32_sai_remove() function
and use devm_of_platform_populate().

Olivier Moysan (3):
  ASoC: stm32: fix sync property description in SAI bindings
  ASoC: stm32: sai: simplify sync modes management
  ASoC: stm32: sai: use devm_of_platform_populate()

 .../devicetree/bindings/sound/st,stm32-sai.txt     |  12 ++-
 sound/soc/stm/stm32_sai.c                          | 114 ++++-----------------
 2 files changed, 29 insertions(+), 97 deletions(-)

-- 
1.9.1

[PATCH 0/3] ASoC: stm32: sai: fixes related to synchro feature

[Olivier Moysan]

Fix sai binding and simplify code related to synchro feature.
This change allows to remove stm32_sai_remove() function
and use devm_of_platform_populate().

Olivier Moysan (3):
  ASoC: stm32: fix sync property description in SAI bindings
  ASoC: stm32: sai: simplify sync modes management
  ASoC: stm32: sai: use devm_of_platform_populate()

 .../devicetree/bindings/sound/st,stm32-sai.txt     |  12 ++-
 sound/soc/stm/stm32_sai.c                          | 114 ++++-----------------
 2 files changed, 29 insertions(+), 97 deletions(-)

-- 
1.9.1

[PATCH 0/3] ASoC: stm32: sai: fixes related to synchro feature

[Olivier Moysan]

Fix sai binding and simplify code related to synchro feature.
This change allows to remove stm32_sai_remove() function
and use devm_of_platform_populate().

Olivier Moysan (3):
  ASoC: stm32: fix sync property description in SAI bindings
  ASoC: stm32: sai: simplify sync modes management
  ASoC: stm32: sai: use devm_of_platform_populate()

 .../devicetree/bindings/sound/st,stm32-sai.txt     |  12 ++-
 sound/soc/stm/stm32_sai.c                          | 114 ++++-----------------
 2 files changed, 29 insertions(+), 97 deletions(-)

-- 
1.9.1

[PATCH 1/3] ASoC: stm32: fix sync property description in SAI bindings

[Olivier Moysan]

SAI sync property must be described in SAI subnodes
section, as it is a property of child node.
This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
"ASoC: stm32: Add synchronization to SAI bindings".

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
index 1f9cd70..b1acc1a 100644
--- a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
+++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
@@ -20,11 +20,6 @@ Required properties:
 
 Optional properties:
   - resets: Reference to a reset controller asserting the SAI
-  - st,sync: specify synchronization mode.
-	By default SAI sub-block is in asynchronous mode.
-	This property sets SAI sub-block as slave of another SAI sub-block.
-	Must contain the phandle and index of the sai sub-block providing
-	the synchronization.
 
 SAI subnodes:
 Two subnodes corresponding to SAI sub-block instances A et B can be defined.
@@ -44,6 +39,13 @@ SAI subnodes required properties:
   - pinctrl-names: should contain only value "default"
   - pinctrl-0: see Documentation/devicetree/bindings/pinctrl/pinctrl-stm32.txt
 
+SAI subnodes Optional properties:
+  - st,sync: specify synchronization mode.
+	By default SAI sub-block is in asynchronous mode.
+	This property sets SAI sub-block as slave of another SAI sub-block.
+	Must contain the phandle and index of the sai sub-block providing
+	the synchronization.
+
 The device node should contain one 'port' child node with one child 'endpoint'
 node, according to the bindings defined in Documentation/devicetree/bindings/
 graph.txt.
-- 
1.9.1

[PATCH 1/3] ASoC: stm32: fix sync property description in SAI bindings

[Olivier Moysan]

SAI sync property must be described in SAI subnodes
section, as it is a property of child node.
This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
"ASoC: stm32: Add synchronization to SAI bindings".

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
index 1f9cd70..b1acc1a 100644
--- a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
+++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
@@ -20,11 +20,6 @@ Required properties:
 
 Optional properties:
   - resets: Reference to a reset controller asserting the SAI
-  - st,sync: specify synchronization mode.
-	By default SAI sub-block is in asynchronous mode.
-	This property sets SAI sub-block as slave of another SAI sub-block.
-	Must contain the phandle and index of the sai sub-block providing
-	the synchronization.
 
 SAI subnodes:
 Two subnodes corresponding to SAI sub-block instances A et B can be defined.
@@ -44,6 +39,13 @@ SAI subnodes required properties:
   - pinctrl-names: should contain only value "default"
   - pinctrl-0: see Documentation/devicetree/bindings/pinctrl/pinctrl-stm32.txt
 
+SAI subnodes Optional properties:
+  - st,sync: specify synchronization mode.
+	By default SAI sub-block is in asynchronous mode.
+	This property sets SAI sub-block as slave of another SAI sub-block.
+	Must contain the phandle and index of the sai sub-block providing
+	the synchronization.
+
 The device node should contain one 'port' child node with one child 'endpoint'
 node, according to the bindings defined in Documentation/devicetree/bindings/
 graph.txt.
-- 
1.9.1

[PATCH 1/3] ASoC: stm32: fix sync property description in SAI bindings

[Olivier Moysan]

SAI sync property must be described in SAI subnodes
section, as it is a property of child node.
This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
"ASoC: stm32: Add synchronization to SAI bindings".

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
index 1f9cd70..b1acc1a 100644
--- a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
+++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
@@ -20,11 +20,6 @@ Required properties:
 
 Optional properties:
   - resets: Reference to a reset controller asserting the SAI
-  - st,sync: specify synchronization mode.
-	By default SAI sub-block is in asynchronous mode.
-	This property sets SAI sub-block as slave of another SAI sub-block.
-	Must contain the phandle and index of the sai sub-block providing
-	the synchronization.
 
 SAI subnodes:
 Two subnodes corresponding to SAI sub-block instances A et B can be defined.
@@ -44,6 +39,13 @@ SAI subnodes required properties:
   - pinctrl-names: should contain only value "default"
   - pinctrl-0: see Documentation/devicetree/bindings/pinctrl/pinctrl-stm32.txt
 
+SAI subnodes Optional properties:
+  - st,sync: specify synchronization mode.
+	By default SAI sub-block is in asynchronous mode.
+	This property sets SAI sub-block as slave of another SAI sub-block.
+	Must contain the phandle and index of the sai sub-block providing
+	the synchronization.
+
 The device node should contain one 'port' child node with one child 'endpoint'
 node, according to the bindings defined in Documentation/devicetree/bindings/
 graph.txt.
-- 
1.9.1

[PATCH 2/3] ASoC: stm32: sai: simplify sync modes management

[Olivier Moysan]

Use function of_find_device_by_node() to retrieve SAI
synchro provider device and private data.
This allows to remove registration of probed SAI
in a linked list.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 sound/soc/stm/stm32_sai.c | 105 ++++++++++------------------------------------
 1 file changed, 22 insertions(+), 83 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index d6f71a3..0a1f064 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -28,16 +28,6 @@
 
 #include "stm32_sai.h"
 
-static LIST_HEAD(sync_providers);
-static DEFINE_MUTEX(sync_mutex);
-
-struct sync_provider {
-	struct list_head link;
-	struct device_node *node;
-	int  (*sync_conf)(void *data, int synco);
-	void *data;
-};
-
 static const struct stm32_sai_conf stm32_sai_conf_f4 = {
 	.version = SAI_STM32F4,
 };
@@ -70,9 +60,8 @@ static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)
 	return 0;
 }
 
-static int stm32_sai_sync_conf_provider(void *data, int synco)
+static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)
 {
-	struct stm32_sai_data *sai = (struct stm32_sai_data *)data;
 	u32 prev_synco;
 	int ret;
 
@@ -103,73 +92,34 @@ static int stm32_sai_sync_conf_provider(void *data, int synco)
 	return 0;
 }
 
-static int stm32_sai_set_sync_provider(struct device_node *np, int synco)
+static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
+			      struct device_node *np_provider,
+			      int synco, int synci)
 {
-	struct sync_provider *provider;
+	struct platform_device *pdev = of_find_device_by_node(np_provider);
+	struct stm32_sai_data *sai_provider;
 	int ret;
 
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(provider, &sync_providers, link) {
-		if (provider->node == np) {
-			ret = provider->sync_conf(provider->data, synco);
-			mutex_unlock(&sync_mutex);
-			return ret;
-		}
+	if (!pdev) {
+		dev_err(&sai_client->pdev->dev,
+			"Device not found for node %s\n", np_provider->name);
+		return -ENODEV;
 	}
-	mutex_unlock(&sync_mutex);
 
-	/* SAI sync provider not found */
-	return -ENODEV;
-}
-
-static int stm32_sai_set_sync(struct stm32_sai_data *sai,
-			      struct device_node *np_provider,
-			      int synco, int synci)
-{
-	int ret;
+	sai_provider = platform_get_drvdata(pdev);
+	if (!sai_provider) {
+		dev_err(&sai_client->pdev->dev,
+			"SAI sync provider data not found\n");
+		return -EINVAL;
+	}
 
 	/* Configure sync client */
-	stm32_sai_sync_conf_client(sai, synci);
+	ret = stm32_sai_sync_conf_client(sai_client, synci);
+	if (ret < 0)
+		return ret;
 
 	/* Configure sync provider */
-	ret = stm32_sai_set_sync_provider(np_provider, synco);
-
-	return ret;
-}
-
-static int stm32_sai_sync_add_provider(struct platform_device *pdev,
-				       void *data)
-{
-	struct sync_provider *sp;
-
-	sp = devm_kzalloc(&pdev->dev, sizeof(*sp), GFP_KERNEL);
-	if (!sp)
-		return -ENOMEM;
-
-	sp->node = of_node_get(pdev->dev.of_node);
-	sp->data = data;
-	sp->sync_conf = &stm32_sai_sync_conf_provider;
-
-	mutex_lock(&sync_mutex);
-	list_add(&sp->link, &sync_providers);
-	mutex_unlock(&sync_mutex);
-
-	return 0;
-}
-
-static void stm32_sai_sync_del_provider(struct device_node *np)
-{
-	struct sync_provider *sp;
-
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(sp, &sync_providers, link) {
-		if (sp->node == np) {
-			list_del(&sp->link);
-			of_node_put(sp->node);
-			break;
-		}
-	}
-	mutex_unlock(&sync_mutex);
+	return stm32_sai_sync_conf_provider(sai_provider, synco);
 }
 
 static int stm32_sai_probe(struct platform_device *pdev)
@@ -179,7 +129,6 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	struct reset_control *rst;
 	struct resource *res;
 	const struct of_device_id *of_id;
-	int ret;
 
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
@@ -231,27 +180,17 @@ static int stm32_sai_probe(struct platform_device *pdev)
 		reset_control_deassert(rst);
 	}
 
-	ret = stm32_sai_sync_add_provider(pdev, sai);
-	if (ret < 0)
-		return ret;
-	sai->set_sync = &stm32_sai_set_sync;
-
 	sai->pdev = pdev;
+	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
-	if (ret < 0)
-		stm32_sai_sync_del_provider(np);
-
-	return ret;
+	return of_platform_populate(np, NULL, NULL, &pdev->dev);
 }
 
 static int stm32_sai_remove(struct platform_device *pdev)
 {
 	of_platform_depopulate(&pdev->dev);
 
-	stm32_sai_sync_del_provider(pdev->dev.of_node);
-
 	return 0;
 }
 
-- 
1.9.1

[PATCH 2/3] ASoC: stm32: sai: simplify sync modes management

[Olivier Moysan]

Use function of_find_device_by_node() to retrieve SAI
synchro provider device and private data.
This allows to remove registration of probed SAI
in a linked list.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 sound/soc/stm/stm32_sai.c | 105 ++++++++++------------------------------------
 1 file changed, 22 insertions(+), 83 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index d6f71a3..0a1f064 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -28,16 +28,6 @@
 
 #include "stm32_sai.h"
 
-static LIST_HEAD(sync_providers);
-static DEFINE_MUTEX(sync_mutex);
-
-struct sync_provider {
-	struct list_head link;
-	struct device_node *node;
-	int  (*sync_conf)(void *data, int synco);
-	void *data;
-};
-
 static const struct stm32_sai_conf stm32_sai_conf_f4 = {
 	.version = SAI_STM32F4,
 };
@@ -70,9 +60,8 @@ static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)
 	return 0;
 }
 
-static int stm32_sai_sync_conf_provider(void *data, int synco)
+static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)
 {
-	struct stm32_sai_data *sai = (struct stm32_sai_data *)data;
 	u32 prev_synco;
 	int ret;
 
@@ -103,73 +92,34 @@ static int stm32_sai_sync_conf_provider(void *data, int synco)
 	return 0;
 }
 
-static int stm32_sai_set_sync_provider(struct device_node *np, int synco)
+static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
+			      struct device_node *np_provider,
+			      int synco, int synci)
 {
-	struct sync_provider *provider;
+	struct platform_device *pdev = of_find_device_by_node(np_provider);
+	struct stm32_sai_data *sai_provider;
 	int ret;
 
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(provider, &sync_providers, link) {
-		if (provider->node == np) {
-			ret = provider->sync_conf(provider->data, synco);
-			mutex_unlock(&sync_mutex);
-			return ret;
-		}
+	if (!pdev) {
+		dev_err(&sai_client->pdev->dev,
+			"Device not found for node %s\n", np_provider->name);
+		return -ENODEV;
 	}
-	mutex_unlock(&sync_mutex);
 
-	/* SAI sync provider not found */
-	return -ENODEV;
-}
-
-static int stm32_sai_set_sync(struct stm32_sai_data *sai,
-			      struct device_node *np_provider,
-			      int synco, int synci)
-{
-	int ret;
+	sai_provider = platform_get_drvdata(pdev);
+	if (!sai_provider) {
+		dev_err(&sai_client->pdev->dev,
+			"SAI sync provider data not found\n");
+		return -EINVAL;
+	}
 
 	/* Configure sync client */
-	stm32_sai_sync_conf_client(sai, synci);
+	ret = stm32_sai_sync_conf_client(sai_client, synci);
+	if (ret < 0)
+		return ret;
 
 	/* Configure sync provider */
-	ret = stm32_sai_set_sync_provider(np_provider, synco);
-
-	return ret;
-}
-
-static int stm32_sai_sync_add_provider(struct platform_device *pdev,
-				       void *data)
-{
-	struct sync_provider *sp;
-
-	sp = devm_kzalloc(&pdev->dev, sizeof(*sp), GFP_KERNEL);
-	if (!sp)
-		return -ENOMEM;
-
-	sp->node = of_node_get(pdev->dev.of_node);
-	sp->data = data;
-	sp->sync_conf = &stm32_sai_sync_conf_provider;
-
-	mutex_lock(&sync_mutex);
-	list_add(&sp->link, &sync_providers);
-	mutex_unlock(&sync_mutex);
-
-	return 0;
-}
-
-static void stm32_sai_sync_del_provider(struct device_node *np)
-{
-	struct sync_provider *sp;
-
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(sp, &sync_providers, link) {
-		if (sp->node == np) {
-			list_del(&sp->link);
-			of_node_put(sp->node);
-			break;
-		}
-	}
-	mutex_unlock(&sync_mutex);
+	return stm32_sai_sync_conf_provider(sai_provider, synco);
 }
 
 static int stm32_sai_probe(struct platform_device *pdev)
@@ -179,7 +129,6 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	struct reset_control *rst;
 	struct resource *res;
 	const struct of_device_id *of_id;
-	int ret;
 
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
@@ -231,27 +180,17 @@ static int stm32_sai_probe(struct platform_device *pdev)
 		reset_control_deassert(rst);
 	}
 
-	ret = stm32_sai_sync_add_provider(pdev, sai);
-	if (ret < 0)
-		return ret;
-	sai->set_sync = &stm32_sai_set_sync;
-
 	sai->pdev = pdev;
+	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
-	if (ret < 0)
-		stm32_sai_sync_del_provider(np);
-
-	return ret;
+	return of_platform_populate(np, NULL, NULL, &pdev->dev);
 }
 
 static int stm32_sai_remove(struct platform_device *pdev)
 {
 	of_platform_depopulate(&pdev->dev);
 
-	stm32_sai_sync_del_provider(pdev->dev.of_node);
-
 	return 0;
 }
 
-- 
1.9.1

[PATCH 2/3] ASoC: stm32: sai: simplify sync modes management

[Olivier Moysan]

Use function of_find_device_by_node() to retrieve SAI
synchro provider device and private data.
This allows to remove registration of probed SAI
in a linked list.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 sound/soc/stm/stm32_sai.c | 105 ++++++++++------------------------------------
 1 file changed, 22 insertions(+), 83 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index d6f71a3..0a1f064 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -28,16 +28,6 @@
 
 #include "stm32_sai.h"
 
-static LIST_HEAD(sync_providers);
-static DEFINE_MUTEX(sync_mutex);
-
-struct sync_provider {
-	struct list_head link;
-	struct device_node *node;
-	int  (*sync_conf)(void *data, int synco);
-	void *data;
-};
-
 static const struct stm32_sai_conf stm32_sai_conf_f4 = {
 	.version = SAI_STM32F4,
 };
@@ -70,9 +60,8 @@ static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)
 	return 0;
 }
 
-static int stm32_sai_sync_conf_provider(void *data, int synco)
+static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)
 {
-	struct stm32_sai_data *sai = (struct stm32_sai_data *)data;
 	u32 prev_synco;
 	int ret;
 
@@ -103,73 +92,34 @@ static int stm32_sai_sync_conf_provider(void *data, int synco)
 	return 0;
 }
 
-static int stm32_sai_set_sync_provider(struct device_node *np, int synco)
+static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
+			      struct device_node *np_provider,
+			      int synco, int synci)
 {
-	struct sync_provider *provider;
+	struct platform_device *pdev = of_find_device_by_node(np_provider);
+	struct stm32_sai_data *sai_provider;
 	int ret;
 
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(provider, &sync_providers, link) {
-		if (provider->node == np) {
-			ret = provider->sync_conf(provider->data, synco);
-			mutex_unlock(&sync_mutex);
-			return ret;
-		}
+	if (!pdev) {
+		dev_err(&sai_client->pdev->dev,
+			"Device not found for node %s\n", np_provider->name);
+		return -ENODEV;
 	}
-	mutex_unlock(&sync_mutex);
 
-	/* SAI sync provider not found */
-	return -ENODEV;
-}
-
-static int stm32_sai_set_sync(struct stm32_sai_data *sai,
-			      struct device_node *np_provider,
-			      int synco, int synci)
-{
-	int ret;
+	sai_provider = platform_get_drvdata(pdev);
+	if (!sai_provider) {
+		dev_err(&sai_client->pdev->dev,
+			"SAI sync provider data not found\n");
+		return -EINVAL;
+	}
 
 	/* Configure sync client */
-	stm32_sai_sync_conf_client(sai, synci);
+	ret = stm32_sai_sync_conf_client(sai_client, synci);
+	if (ret < 0)
+		return ret;
 
 	/* Configure sync provider */
-	ret = stm32_sai_set_sync_provider(np_provider, synco);
-
-	return ret;
-}
-
-static int stm32_sai_sync_add_provider(struct platform_device *pdev,
-				       void *data)
-{
-	struct sync_provider *sp;
-
-	sp = devm_kzalloc(&pdev->dev, sizeof(*sp), GFP_KERNEL);
-	if (!sp)
-		return -ENOMEM;
-
-	sp->node = of_node_get(pdev->dev.of_node);
-	sp->data = data;
-	sp->sync_conf = &stm32_sai_sync_conf_provider;
-
-	mutex_lock(&sync_mutex);
-	list_add(&sp->link, &sync_providers);
-	mutex_unlock(&sync_mutex);
-
-	return 0;
-}
-
-static void stm32_sai_sync_del_provider(struct device_node *np)
-{
-	struct sync_provider *sp;
-
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(sp, &sync_providers, link) {
-		if (sp->node == np) {
-			list_del(&sp->link);
-			of_node_put(sp->node);
-			break;
-		}
-	}
-	mutex_unlock(&sync_mutex);
+	return stm32_sai_sync_conf_provider(sai_provider, synco);
 }
 
 static int stm32_sai_probe(struct platform_device *pdev)
@@ -179,7 +129,6 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	struct reset_control *rst;
 	struct resource *res;
 	const struct of_device_id *of_id;
-	int ret;
 
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
@@ -231,27 +180,17 @@ static int stm32_sai_probe(struct platform_device *pdev)
 		reset_control_deassert(rst);
 	}
 
-	ret = stm32_sai_sync_add_provider(pdev, sai);
-	if (ret < 0)
-		return ret;
-	sai->set_sync = &stm32_sai_set_sync;
-
 	sai->pdev = pdev;
+	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
-	if (ret < 0)
-		stm32_sai_sync_del_provider(np);
-
-	return ret;
+	return of_platform_populate(np, NULL, NULL, &pdev->dev);
 }
 
 static int stm32_sai_remove(struct platform_device *pdev)
 {
 	of_platform_depopulate(&pdev->dev);
 
-	stm32_sai_sync_del_provider(pdev->dev.of_node);
-
 	return 0;
 }
 
-- 
1.9.1

[PATCH 3/3] ASoC: stm32: sai: use devm_of_platform_populate()

[Olivier Moysan]

Use devm_of_platform_populate() instead of of_platform_depopulate()
to simplify driver code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 sound/soc/stm/stm32_sai.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index 0a1f064..d743b7d 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -124,7 +124,6 @@ static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
 
 static int stm32_sai_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32_sai_data *sai;
 	struct reset_control *rst;
 	struct resource *res;
@@ -184,14 +183,7 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	return of_platform_populate(np, NULL, NULL, &pdev->dev);
-}
-
-static int stm32_sai_remove(struct platform_device *pdev)
-{
-	of_platform_depopulate(&pdev->dev);
-
-	return 0;
+	return devm_of_platform_populate(&pdev->dev);
 }
 
 MODULE_DEVICE_TABLE(of, stm32_sai_ids);
@@ -202,7 +194,6 @@ static int stm32_sai_remove(struct platform_device *pdev)
 		.of_match_table = stm32_sai_ids,
 	},
 	.probe = stm32_sai_probe,
-	.remove = stm32_sai_remove,
 };
 
 module_platform_driver(stm32_sai_driver);
-- 
1.9.1

[PATCH 3/3] ASoC: stm32: sai: use devm_of_platform_populate()

[Olivier Moysan]

Use devm_of_platform_populate() instead of of_platform_depopulate()
to simplify driver code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 sound/soc/stm/stm32_sai.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index 0a1f064..d743b7d 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -124,7 +124,6 @@ static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
 
 static int stm32_sai_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32_sai_data *sai;
 	struct reset_control *rst;
 	struct resource *res;
@@ -184,14 +183,7 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	return of_platform_populate(np, NULL, NULL, &pdev->dev);
-}
-
-static int stm32_sai_remove(struct platform_device *pdev)
-{
-	of_platform_depopulate(&pdev->dev);
-
-	return 0;
+	return devm_of_platform_populate(&pdev->dev);
 }
 
 MODULE_DEVICE_TABLE(of, stm32_sai_ids);
@@ -202,7 +194,6 @@ static int stm32_sai_remove(struct platform_device *pdev)
 		.of_match_table = stm32_sai_ids,
 	},
 	.probe = stm32_sai_probe,
-	.remove = stm32_sai_remove,
 };
 
 module_platform_driver(stm32_sai_driver);
-- 
1.9.1

[PATCH 3/3] ASoC: stm32: sai: use devm_of_platform_populate()

[Olivier Moysan]

Use devm_of_platform_populate() instead of of_platform_depopulate()
to simplify driver code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
 sound/soc/stm/stm32_sai.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index 0a1f064..d743b7d 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -124,7 +124,6 @@ static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
 
 static int stm32_sai_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32_sai_data *sai;
 	struct reset_control *rst;
 	struct resource *res;
@@ -184,14 +183,7 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	return of_platform_populate(np, NULL, NULL, &pdev->dev);
-}
-
-static int stm32_sai_remove(struct platform_device *pdev)
-{
-	of_platform_depopulate(&pdev->dev);
-
-	return 0;
+	return devm_of_platform_populate(&pdev->dev);
 }
 
 MODULE_DEVICE_TABLE(of, stm32_sai_ids);
@@ -202,7 +194,6 @@ static int stm32_sai_remove(struct platform_device *pdev)
 		.of_match_table = stm32_sai_ids,
 	},
 	.probe = stm32_sai_probe,
-	.remove = stm32_sai_remove,
 };
 
 module_platform_driver(stm32_sai_driver);
-- 
1.9.1

Re: [PATCH 1/3] ASoC: stm32: fix sync property description in SAI bindings

[Rob Herring]

On Wed, Nov 22, 2017 at 04:02:25PM +0100, Olivier Moysan wrote:
> SAI sync property must be described in SAI subnodes
> section, as it is a property of child node.
> This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
> "ASoC: stm32: Add synchronization to SAI bindings".
> 
> Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
> ---
>  Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH 1/3] ASoC: stm32: fix sync property description in SAI bindings

[Rob Herring]

On Wed, Nov 22, 2017 at 04:02:25PM +0100, Olivier Moysan wrote:
> SAI sync property must be described in SAI subnodes
> section, as it is a property of child node.
> This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
> "ASoC: stm32: Add synchronization to SAI bindings".
> 
> Signed-off-by: Olivier Moysan <olivier.moysan-qxv4g6HH51o@public.gmane.org>
> ---
>  Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

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[PATCH 1/3] ASoC: stm32: fix sync property description in SAI bindings

[Rob Herring]

On Wed, Nov 22, 2017 at 04:02:25PM +0100, Olivier Moysan wrote:
> SAI sync property must be described in SAI subnodes
> section, as it is a property of child node.
> This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
> "ASoC: stm32: Add synchronization to SAI bindings".
> 
> Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
> ---
>  Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)

Acked-by: Rob Herring <robh@kernel.org>

Applied "ASoC: stm32: sai: use devm_of_platform_populate()" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: sai: use devm_of_platform_populate()

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 512d1bb4e86bd0fd4d665d4e454a3486236a419f Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:27 +0100
Subject: [PATCH] ASoC: stm32: sai: use devm_of_platform_populate()

Use devm_of_platform_populate() instead of of_platform_depopulate()
to simplify driver code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/stm/stm32_sai.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index 0a1f06418bf4..d743b7dd52fb 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -124,7 +124,6 @@ static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
 
 static int stm32_sai_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32_sai_data *sai;
 	struct reset_control *rst;
 	struct resource *res;
@@ -184,14 +183,7 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	return of_platform_populate(np, NULL, NULL, &pdev->dev);
-}
-
-static int stm32_sai_remove(struct platform_device *pdev)
-{
-	of_platform_depopulate(&pdev->dev);
-
-	return 0;
+	return devm_of_platform_populate(&pdev->dev);
 }
 
 MODULE_DEVICE_TABLE(of, stm32_sai_ids);
@@ -202,7 +194,6 @@ static struct platform_driver stm32_sai_driver = {
 		.of_match_table = stm32_sai_ids,
 	},
 	.probe = stm32_sai_probe,
-	.remove = stm32_sai_remove,
 };
 
 module_platform_driver(stm32_sai_driver);
-- 
2.15.0

Applied "ASoC: stm32: sai: use devm_of_platform_populate()" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: sai: use devm_of_platform_populate()

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 512d1bb4e86bd0fd4d665d4e454a3486236a419f Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:27 +0100
Subject: [PATCH] ASoC: stm32: sai: use devm_of_platform_populate()

Use devm_of_platform_populate() instead of of_platform_depopulate()
to simplify driver code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/stm/stm32_sai.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index 0a1f06418bf4..d743b7dd52fb 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -124,7 +124,6 @@ static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
 
 static int stm32_sai_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32_sai_data *sai;
 	struct reset_control *rst;
 	struct resource *res;
@@ -184,14 +183,7 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	return of_platform_populate(np, NULL, NULL, &pdev->dev);
-}
-
-static int stm32_sai_remove(struct platform_device *pdev)
-{
-	of_platform_depopulate(&pdev->dev);
-
-	return 0;
+	return devm_of_platform_populate(&pdev->dev);
 }
 
 MODULE_DEVICE_TABLE(of, stm32_sai_ids);
@@ -202,7 +194,6 @@ static struct platform_driver stm32_sai_driver = {
 		.of_match_table = stm32_sai_ids,
 	},
 	.probe = stm32_sai_probe,
-	.remove = stm32_sai_remove,
 };
 
 module_platform_driver(stm32_sai_driver);
-- 
2.15.0

Applied "ASoC: stm32: sai: use devm_of_platform_populate()" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: sai: use devm_of_platform_populate()

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 512d1bb4e86bd0fd4d665d4e454a3486236a419f Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:27 +0100
Subject: [PATCH] ASoC: stm32: sai: use devm_of_platform_populate()

Use devm_of_platform_populate() instead of of_platform_depopulate()
to simplify driver code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/stm/stm32_sai.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index 0a1f06418bf4..d743b7dd52fb 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -124,7 +124,6 @@ static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
 
 static int stm32_sai_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
 	struct stm32_sai_data *sai;
 	struct reset_control *rst;
 	struct resource *res;
@@ -184,14 +183,7 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	return of_platform_populate(np, NULL, NULL, &pdev->dev);
-}
-
-static int stm32_sai_remove(struct platform_device *pdev)
-{
-	of_platform_depopulate(&pdev->dev);
-
-	return 0;
+	return devm_of_platform_populate(&pdev->dev);
 }
 
 MODULE_DEVICE_TABLE(of, stm32_sai_ids);
@@ -202,7 +194,6 @@ static struct platform_driver stm32_sai_driver = {
 		.of_match_table = stm32_sai_ids,
 	},
 	.probe = stm32_sai_probe,
-	.remove = stm32_sai_remove,
 };
 
 module_platform_driver(stm32_sai_driver);
-- 
2.15.0

Applied "ASoC: stm32: sai: simplify sync modes management" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: sai: simplify sync modes management

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 7dd0d835582ff72b0b3bd0f4fa074967dff1ce82 Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:26 +0100
Subject: [PATCH] ASoC: stm32: sai: simplify sync modes management

Use function of_find_device_by_node() to retrieve SAI
synchro provider device and private data.
This allows to remove registration of probed SAI
in a linked list.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/stm/stm32_sai.c | 105 ++++++++++------------------------------------
 1 file changed, 22 insertions(+), 83 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index d6f71a3406e9..0a1f06418bf4 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -28,16 +28,6 @@
 
 #include "stm32_sai.h"
 
-static LIST_HEAD(sync_providers);
-static DEFINE_MUTEX(sync_mutex);
-
-struct sync_provider {
-	struct list_head link;
-	struct device_node *node;
-	int  (*sync_conf)(void *data, int synco);
-	void *data;
-};
-
 static const struct stm32_sai_conf stm32_sai_conf_f4 = {
 	.version = SAI_STM32F4,
 };
@@ -70,9 +60,8 @@ static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)
 	return 0;
 }
 
-static int stm32_sai_sync_conf_provider(void *data, int synco)
+static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)
 {
-	struct stm32_sai_data *sai = (struct stm32_sai_data *)data;
 	u32 prev_synco;
 	int ret;
 
@@ -103,73 +92,34 @@ static int stm32_sai_sync_conf_provider(void *data, int synco)
 	return 0;
 }
 
-static int stm32_sai_set_sync_provider(struct device_node *np, int synco)
+static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
+			      struct device_node *np_provider,
+			      int synco, int synci)
 {
-	struct sync_provider *provider;
+	struct platform_device *pdev = of_find_device_by_node(np_provider);
+	struct stm32_sai_data *sai_provider;
 	int ret;
 
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(provider, &sync_providers, link) {
-		if (provider->node == np) {
-			ret = provider->sync_conf(provider->data, synco);
-			mutex_unlock(&sync_mutex);
-			return ret;
-		}
+	if (!pdev) {
+		dev_err(&sai_client->pdev->dev,
+			"Device not found for node %s\n", np_provider->name);
+		return -ENODEV;
 	}
-	mutex_unlock(&sync_mutex);
 
-	/* SAI sync provider not found */
-	return -ENODEV;
-}
-
-static int stm32_sai_set_sync(struct stm32_sai_data *sai,
-			      struct device_node *np_provider,
-			      int synco, int synci)
-{
-	int ret;
+	sai_provider = platform_get_drvdata(pdev);
+	if (!sai_provider) {
+		dev_err(&sai_client->pdev->dev,
+			"SAI sync provider data not found\n");
+		return -EINVAL;
+	}
 
 	/* Configure sync client */
-	stm32_sai_sync_conf_client(sai, synci);
+	ret = stm32_sai_sync_conf_client(sai_client, synci);
+	if (ret < 0)
+		return ret;
 
 	/* Configure sync provider */
-	ret = stm32_sai_set_sync_provider(np_provider, synco);
-
-	return ret;
-}
-
-static int stm32_sai_sync_add_provider(struct platform_device *pdev,
-				       void *data)
-{
-	struct sync_provider *sp;
-
-	sp = devm_kzalloc(&pdev->dev, sizeof(*sp), GFP_KERNEL);
-	if (!sp)
-		return -ENOMEM;
-
-	sp->node = of_node_get(pdev->dev.of_node);
-	sp->data = data;
-	sp->sync_conf = &stm32_sai_sync_conf_provider;
-
-	mutex_lock(&sync_mutex);
-	list_add(&sp->link, &sync_providers);
-	mutex_unlock(&sync_mutex);
-
-	return 0;
-}
-
-static void stm32_sai_sync_del_provider(struct device_node *np)
-{
-	struct sync_provider *sp;
-
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(sp, &sync_providers, link) {
-		if (sp->node == np) {
-			list_del(&sp->link);
-			of_node_put(sp->node);
-			break;
-		}
-	}
-	mutex_unlock(&sync_mutex);
+	return stm32_sai_sync_conf_provider(sai_provider, synco);
 }
 
 static int stm32_sai_probe(struct platform_device *pdev)
@@ -179,7 +129,6 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	struct reset_control *rst;
 	struct resource *res;
 	const struct of_device_id *of_id;
-	int ret;
 
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
@@ -231,27 +180,17 @@ static int stm32_sai_probe(struct platform_device *pdev)
 		reset_control_deassert(rst);
 	}
 
-	ret = stm32_sai_sync_add_provider(pdev, sai);
-	if (ret < 0)
-		return ret;
-	sai->set_sync = &stm32_sai_set_sync;
-
 	sai->pdev = pdev;
+	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
-	if (ret < 0)
-		stm32_sai_sync_del_provider(np);
-
-	return ret;
+	return of_platform_populate(np, NULL, NULL, &pdev->dev);
 }
 
 static int stm32_sai_remove(struct platform_device *pdev)
 {
 	of_platform_depopulate(&pdev->dev);
 
-	stm32_sai_sync_del_provider(pdev->dev.of_node);
-
 	return 0;
 }
 
-- 
2.15.0

Applied "ASoC: stm32: sai: simplify sync modes management" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: sai: simplify sync modes management

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 7dd0d835582ff72b0b3bd0f4fa074967dff1ce82 Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:26 +0100
Subject: [PATCH] ASoC: stm32: sai: simplify sync modes management

Use function of_find_device_by_node() to retrieve SAI
synchro provider device and private data.
This allows to remove registration of probed SAI
in a linked list.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/stm/stm32_sai.c | 105 ++++++++++------------------------------------
 1 file changed, 22 insertions(+), 83 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index d6f71a3406e9..0a1f06418bf4 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -28,16 +28,6 @@
 
 #include "stm32_sai.h"
 
-static LIST_HEAD(sync_providers);
-static DEFINE_MUTEX(sync_mutex);
-
-struct sync_provider {
-	struct list_head link;
-	struct device_node *node;
-	int  (*sync_conf)(void *data, int synco);
-	void *data;
-};
-
 static const struct stm32_sai_conf stm32_sai_conf_f4 = {
 	.version = SAI_STM32F4,
 };
@@ -70,9 +60,8 @@ static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)
 	return 0;
 }
 
-static int stm32_sai_sync_conf_provider(void *data, int synco)
+static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)
 {
-	struct stm32_sai_data *sai = (struct stm32_sai_data *)data;
 	u32 prev_synco;
 	int ret;
 
@@ -103,73 +92,34 @@ static int stm32_sai_sync_conf_provider(void *data, int synco)
 	return 0;
 }
 
-static int stm32_sai_set_sync_provider(struct device_node *np, int synco)
+static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
+			      struct device_node *np_provider,
+			      int synco, int synci)
 {
-	struct sync_provider *provider;
+	struct platform_device *pdev = of_find_device_by_node(np_provider);
+	struct stm32_sai_data *sai_provider;
 	int ret;
 
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(provider, &sync_providers, link) {
-		if (provider->node == np) {
-			ret = provider->sync_conf(provider->data, synco);
-			mutex_unlock(&sync_mutex);
-			return ret;
-		}
+	if (!pdev) {
+		dev_err(&sai_client->pdev->dev,
+			"Device not found for node %s\n", np_provider->name);
+		return -ENODEV;
 	}
-	mutex_unlock(&sync_mutex);
 
-	/* SAI sync provider not found */
-	return -ENODEV;
-}
-
-static int stm32_sai_set_sync(struct stm32_sai_data *sai,
-			      struct device_node *np_provider,
-			      int synco, int synci)
-{
-	int ret;
+	sai_provider = platform_get_drvdata(pdev);
+	if (!sai_provider) {
+		dev_err(&sai_client->pdev->dev,
+			"SAI sync provider data not found\n");
+		return -EINVAL;
+	}
 
 	/* Configure sync client */
-	stm32_sai_sync_conf_client(sai, synci);
+	ret = stm32_sai_sync_conf_client(sai_client, synci);
+	if (ret < 0)
+		return ret;
 
 	/* Configure sync provider */
-	ret = stm32_sai_set_sync_provider(np_provider, synco);
-
-	return ret;
-}
-
-static int stm32_sai_sync_add_provider(struct platform_device *pdev,
-				       void *data)
-{
-	struct sync_provider *sp;
-
-	sp = devm_kzalloc(&pdev->dev, sizeof(*sp), GFP_KERNEL);
-	if (!sp)
-		return -ENOMEM;
-
-	sp->node = of_node_get(pdev->dev.of_node);
-	sp->data = data;
-	sp->sync_conf = &stm32_sai_sync_conf_provider;
-
-	mutex_lock(&sync_mutex);
-	list_add(&sp->link, &sync_providers);
-	mutex_unlock(&sync_mutex);
-
-	return 0;
-}
-
-static void stm32_sai_sync_del_provider(struct device_node *np)
-{
-	struct sync_provider *sp;
-
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(sp, &sync_providers, link) {
-		if (sp->node == np) {
-			list_del(&sp->link);
-			of_node_put(sp->node);
-			break;
-		}
-	}
-	mutex_unlock(&sync_mutex);
+	return stm32_sai_sync_conf_provider(sai_provider, synco);
 }
 
 static int stm32_sai_probe(struct platform_device *pdev)
@@ -179,7 +129,6 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	struct reset_control *rst;
 	struct resource *res;
 	const struct of_device_id *of_id;
-	int ret;
 
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
@@ -231,27 +180,17 @@ static int stm32_sai_probe(struct platform_device *pdev)
 		reset_control_deassert(rst);
 	}
 
-	ret = stm32_sai_sync_add_provider(pdev, sai);
-	if (ret < 0)
-		return ret;
-	sai->set_sync = &stm32_sai_set_sync;
-
 	sai->pdev = pdev;
+	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
-	if (ret < 0)
-		stm32_sai_sync_del_provider(np);
-
-	return ret;
+	return of_platform_populate(np, NULL, NULL, &pdev->dev);
 }
 
 static int stm32_sai_remove(struct platform_device *pdev)
 {
 	of_platform_depopulate(&pdev->dev);
 
-	stm32_sai_sync_del_provider(pdev->dev.of_node);
-
 	return 0;
 }
 
-- 
2.15.0

Applied "ASoC: stm32: sai: simplify sync modes management" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: sai: simplify sync modes management

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 7dd0d835582ff72b0b3bd0f4fa074967dff1ce82 Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:26 +0100
Subject: [PATCH] ASoC: stm32: sai: simplify sync modes management

Use function of_find_device_by_node() to retrieve SAI
synchro provider device and private data.
This allows to remove registration of probed SAI
in a linked list.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/stm/stm32_sai.c | 105 ++++++++++------------------------------------
 1 file changed, 22 insertions(+), 83 deletions(-)

diff --git a/sound/soc/stm/stm32_sai.c b/sound/soc/stm/stm32_sai.c
index d6f71a3406e9..0a1f06418bf4 100644
--- a/sound/soc/stm/stm32_sai.c
+++ b/sound/soc/stm/stm32_sai.c
@@ -28,16 +28,6 @@
 
 #include "stm32_sai.h"
 
-static LIST_HEAD(sync_providers);
-static DEFINE_MUTEX(sync_mutex);
-
-struct sync_provider {
-	struct list_head link;
-	struct device_node *node;
-	int  (*sync_conf)(void *data, int synco);
-	void *data;
-};
-
 static const struct stm32_sai_conf stm32_sai_conf_f4 = {
 	.version = SAI_STM32F4,
 };
@@ -70,9 +60,8 @@ static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)
 	return 0;
 }
 
-static int stm32_sai_sync_conf_provider(void *data, int synco)
+static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)
 {
-	struct stm32_sai_data *sai = (struct stm32_sai_data *)data;
 	u32 prev_synco;
 	int ret;
 
@@ -103,73 +92,34 @@ static int stm32_sai_sync_conf_provider(void *data, int synco)
 	return 0;
 }
 
-static int stm32_sai_set_sync_provider(struct device_node *np, int synco)
+static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
+			      struct device_node *np_provider,
+			      int synco, int synci)
 {
-	struct sync_provider *provider;
+	struct platform_device *pdev = of_find_device_by_node(np_provider);
+	struct stm32_sai_data *sai_provider;
 	int ret;
 
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(provider, &sync_providers, link) {
-		if (provider->node == np) {
-			ret = provider->sync_conf(provider->data, synco);
-			mutex_unlock(&sync_mutex);
-			return ret;
-		}
+	if (!pdev) {
+		dev_err(&sai_client->pdev->dev,
+			"Device not found for node %s\n", np_provider->name);
+		return -ENODEV;
 	}
-	mutex_unlock(&sync_mutex);
 
-	/* SAI sync provider not found */
-	return -ENODEV;
-}
-
-static int stm32_sai_set_sync(struct stm32_sai_data *sai,
-			      struct device_node *np_provider,
-			      int synco, int synci)
-{
-	int ret;
+	sai_provider = platform_get_drvdata(pdev);
+	if (!sai_provider) {
+		dev_err(&sai_client->pdev->dev,
+			"SAI sync provider data not found\n");
+		return -EINVAL;
+	}
 
 	/* Configure sync client */
-	stm32_sai_sync_conf_client(sai, synci);
+	ret = stm32_sai_sync_conf_client(sai_client, synci);
+	if (ret < 0)
+		return ret;
 
 	/* Configure sync provider */
-	ret = stm32_sai_set_sync_provider(np_provider, synco);
-
-	return ret;
-}
-
-static int stm32_sai_sync_add_provider(struct platform_device *pdev,
-				       void *data)
-{
-	struct sync_provider *sp;
-
-	sp = devm_kzalloc(&pdev->dev, sizeof(*sp), GFP_KERNEL);
-	if (!sp)
-		return -ENOMEM;
-
-	sp->node = of_node_get(pdev->dev.of_node);
-	sp->data = data;
-	sp->sync_conf = &stm32_sai_sync_conf_provider;
-
-	mutex_lock(&sync_mutex);
-	list_add(&sp->link, &sync_providers);
-	mutex_unlock(&sync_mutex);
-
-	return 0;
-}
-
-static void stm32_sai_sync_del_provider(struct device_node *np)
-{
-	struct sync_provider *sp;
-
-	mutex_lock(&sync_mutex);
-	list_for_each_entry(sp, &sync_providers, link) {
-		if (sp->node == np) {
-			list_del(&sp->link);
-			of_node_put(sp->node);
-			break;
-		}
-	}
-	mutex_unlock(&sync_mutex);
+	return stm32_sai_sync_conf_provider(sai_provider, synco);
 }
 
 static int stm32_sai_probe(struct platform_device *pdev)
@@ -179,7 +129,6 @@ static int stm32_sai_probe(struct platform_device *pdev)
 	struct reset_control *rst;
 	struct resource *res;
 	const struct of_device_id *of_id;
-	int ret;
 
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
@@ -231,27 +180,17 @@ static int stm32_sai_probe(struct platform_device *pdev)
 		reset_control_deassert(rst);
 	}
 
-	ret = stm32_sai_sync_add_provider(pdev, sai);
-	if (ret < 0)
-		return ret;
-	sai->set_sync = &stm32_sai_set_sync;
-
 	sai->pdev = pdev;
+	sai->set_sync = &stm32_sai_set_sync;
 	platform_set_drvdata(pdev, sai);
 
-	ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
-	if (ret < 0)
-		stm32_sai_sync_del_provider(np);
-
-	return ret;
+	return of_platform_populate(np, NULL, NULL, &pdev->dev);
 }
 
 static int stm32_sai_remove(struct platform_device *pdev)
 {
 	of_platform_depopulate(&pdev->dev);
 
-	stm32_sai_sync_del_provider(pdev->dev.of_node);
-
 	return 0;
 }
 
-- 
2.15.0

Applied "ASoC: stm32: fix sync property description in SAI bindings" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: fix sync property description in SAI bindings

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4be0ffdf284046eb7289fa66cc7b2eb8d7efdc64 Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:25 +0100
Subject: [PATCH] ASoC: stm32: fix sync property description in SAI bindings

SAI sync property must be described in SAI subnodes
section, as it is a property of child node.
This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
"ASoC: stm32: Add synchronization to SAI bindings".

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
index 1f9cd7095337..b1acc1a256ba 100644
--- a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
+++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
@@ -20,11 +20,6 @@ Required properties:
 
 Optional properties:
   - resets: Reference to a reset controller asserting the SAI
-  - st,sync: specify synchronization mode.
-	By default SAI sub-block is in asynchronous mode.
-	This property sets SAI sub-block as slave of another SAI sub-block.
-	Must contain the phandle and index of the sai sub-block providing
-	the synchronization.
 
 SAI subnodes:
 Two subnodes corresponding to SAI sub-block instances A et B can be defined.
@@ -44,6 +39,13 @@ SAI subnodes required properties:
   - pinctrl-names: should contain only value "default"
   - pinctrl-0: see Documentation/devicetree/bindings/pinctrl/pinctrl-stm32.txt
 
+SAI subnodes Optional properties:
+  - st,sync: specify synchronization mode.
+	By default SAI sub-block is in asynchronous mode.
+	This property sets SAI sub-block as slave of another SAI sub-block.
+	Must contain the phandle and index of the sai sub-block providing
+	the synchronization.
+
 The device node should contain one 'port' child node with one child 'endpoint'
 node, according to the bindings defined in Documentation/devicetree/bindings/
 graph.txt.
-- 
2.15.0

Applied "ASoC: stm32: fix sync property description in SAI bindings" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: fix sync property description in SAI bindings

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4be0ffdf284046eb7289fa66cc7b2eb8d7efdc64 Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:25 +0100
Subject: [PATCH] ASoC: stm32: fix sync property description in SAI bindings

SAI sync property must be described in SAI subnodes
section, as it is a property of child node.
This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
"ASoC: stm32: Add synchronization to SAI bindings".

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
index 1f9cd7095337..b1acc1a256ba 100644
--- a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
+++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
@@ -20,11 +20,6 @@ Required properties:
 
 Optional properties:
   - resets: Reference to a reset controller asserting the SAI
-  - st,sync: specify synchronization mode.
-	By default SAI sub-block is in asynchronous mode.
-	This property sets SAI sub-block as slave of another SAI sub-block.
-	Must contain the phandle and index of the sai sub-block providing
-	the synchronization.
 
 SAI subnodes:
 Two subnodes corresponding to SAI sub-block instances A et B can be defined.
@@ -44,6 +39,13 @@ SAI subnodes required properties:
   - pinctrl-names: should contain only value "default"
   - pinctrl-0: see Documentation/devicetree/bindings/pinctrl/pinctrl-stm32.txt
 
+SAI subnodes Optional properties:
+  - st,sync: specify synchronization mode.
+	By default SAI sub-block is in asynchronous mode.
+	This property sets SAI sub-block as slave of another SAI sub-block.
+	Must contain the phandle and index of the sai sub-block providing
+	the synchronization.
+
 The device node should contain one 'port' child node with one child 'endpoint'
 node, according to the bindings defined in Documentation/devicetree/bindings/
 graph.txt.
-- 
2.15.0

Applied "ASoC: stm32: fix sync property description in SAI bindings" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: fix sync property description in SAI bindings

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4be0ffdf284046eb7289fa66cc7b2eb8d7efdc64 Mon Sep 17 00:00:00 2001
From: olivier moysan <olivier.moysan@st.com>
Date: Wed, 22 Nov 2017 16:02:25 +0100
Subject: [PATCH] ASoC: stm32: fix sync property description in SAI bindings

SAI sync property must be described in SAI subnodes
section, as it is a property of child node.
This patch fixes commit 14f0e5f8d97e632695d92f41f2e91d10d8005d47
"ASoC: stm32: Add synchronization to SAI bindings".

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 Documentation/devicetree/bindings/sound/st,stm32-sai.txt | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
index 1f9cd7095337..b1acc1a256ba 100644
--- a/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
+++ b/Documentation/devicetree/bindings/sound/st,stm32-sai.txt
@@ -20,11 +20,6 @@ Required properties:
 
 Optional properties:
   - resets: Reference to a reset controller asserting the SAI
-  - st,sync: specify synchronization mode.
-	By default SAI sub-block is in asynchronous mode.
-	This property sets SAI sub-block as slave of another SAI sub-block.
-	Must contain the phandle and index of the sai sub-block providing
-	the synchronization.
 
 SAI subnodes:
 Two subnodes corresponding to SAI sub-block instances A et B can be defined.
@@ -44,6 +39,13 @@ SAI subnodes required properties:
   - pinctrl-names: should contain only value "default"
   - pinctrl-0: see Documentation/devicetree/bindings/pinctrl/pinctrl-stm32.txt
 
+SAI subnodes Optional properties:
+  - st,sync: specify synchronization mode.
+	By default SAI sub-block is in asynchronous mode.
+	This property sets SAI sub-block as slave of another SAI sub-block.
+	Must contain the phandle and index of the sai sub-block providing
+	the synchronization.
+
 The device node should contain one 'port' child node with one child 'endpoint'
 node, according to the bindings defined in Documentation/devicetree/bindings/
 graph.txt.
-- 
2.15.0